Temporal dependence of high-order harmonics in the presence of strong ionization

A. Bouhal P. Salières 1 P. Breger 1 P. Agostini 1 Guy Hamoniaux 2 André Mysyrowicz 2 André Antonetti 2 R. Constantinescu 3 H. G. Muller 3
1 SPAM - Service des Photons, Atomes et Molécules
2 LOA - Laboratoire d'optique appliquée
3 AMOLF - FOM Institute for Atomic and Molecular Physics
Abstract : The temporal behavior of the 19th harmonic of a Ti:sapphire laser generated in argon was investigated by a cross-correlation technique at intensities close to saturation. Pulses about half as long as predicted on the basis of the scaling law of the atomic dipole strength on intensity were found. Analysis shows that this is a consequence of both the intensity-dependent dipole phase and the depletion of the medium by ionization.
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Submitted on : Friday, March 19, 2010 - 11:38:24 PM
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A. Bouhal, P. Salières, P. Breger, P. Agostini, Guy Hamoniaux, et al.. Temporal dependence of high-order harmonics in the presence of strong ionization. Physical Review A, American Physical Society, 1998, 58 (1), pp.389-399. ⟨10.1103/PhysRevA.58.389⟩. ⟨hal-00465600⟩

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